Keratoconus eye disease

The clear window on the front of the eye known as the cornea is normally a regular spherical dome shape. Keratoconus affects the cornea causing it to bulge forward resulting in an irregular cone shape. Keratoconus is a slow, progressive eye disease which often begins during adolescence and early adulthood. The condition occurs in approximately one in 1,000 people.

Keratoconus can cause distorted vision because the cornea is responsible for refracting most of the light that enters the eye. In the later stages of the disease achieving satisfactory vision can be difficult, even with glasses or contacts.